Improvement in blinds



. 'WILLIAM E. BROCK, oF NEW'YORK, N. Y.

IMPROVEMENT IN Bums.

Specification forming part of Letters Patent No. 100,593, dated March 8, 1870.

To all 'whom t may concern:

Be it known that I, WILLIAM E. BROCK, of the city, county, and State of New York, have invented a new and useful Improvement in Blinds, of which the following is a full, clear,

and exact'description, reference being had to the accompanying drawing forming part of this specification, and in which- 1 Figure l represents an inside face view of a blind constructedin accordancewith my im! provement, showing 011e or" its corners broken p away or in section 5 Fig.2, a longitudinal transverse section oi' the same, taken as indicated by the line was in Fig. l; and Fig. 3, an inside` view of one ofthe blind-slats and tenon theretounder one form or modilication.

Similar letters of reference indicate corresponding'parts.

lvly improvement relates to outsideiblinds for windows, Iliade wholly or for the most part of metal, and is more particularly designed to be applied to blinds which are hin gedon their one side to the windowirame, and a-remade up oi' swinging slats, capable of being adjust ed in concert to give an open or close character to the blind. f

My invention consists .in a novel mode ofhanging the metal slats on their tenons, or securing the tenons to the/slats, by forming the l latter withlongitudinal grooves or bends of a peculiar locking or holding character to the tenons that are enteredat the end or ends of H the slats within said groove. Also, the in-v vention includes a peculiar hollow metallic frame to the blind, substantially as hereinafter described. A blind constructed according to said invention is at re-prool Referring to the accompanying drawing, the

`frameoi' the blind is here shown as constructed of hollow sheet-iron tubes A A, ot' rectanguiar form in vtheir transverse section, and

united by metal elbows B B, which may be made of malleable iron, and are of rectangular shape, to accord with the square or oblong once light, cheap, andv form of the frame; alsoV are reduced at their ends, so as to fit within the tubes A A that bear at their extremities against shoulders a` cv/,formed by the reduction of the velbows at their ends. Thus fitted together, the joints' established by the tubes and their hollow elbows may be soldered to make close and secure the same.

The tubes A A being a regular marketable commodity, it is only necessary to have the hollow elbows B B cast or formed to suit. In j this way may a blind-frame be made light,

cheap, and durable, besides having the advantage of being nre-proof. Y

The swinging slats C G are made out of sheet metal, with their tenonsV D secured to them by forming the slats on their inside faces, with longitudinal grooves b, of curvilinear form in their transverse section, and of great er sweep than a semicircle, so that,on entering the tenons D within and through the ends ofthe grooves b, the metal of the slats, byA its rigidity, serves to retain and secure the tenons in their place, preferably, however, soldering the tenons and slats together to cement their junction. v

The tenons to each slat may either be made by running a whole rod through the entire length of the slat, as represented in Fig. l, or by entering within the sla-t from the Aopposite ends of the groove therein two short rods or bars, as shown in Fig. 3.

What is here claimed, and desired to be se# cured by Letters Patent, is-

1. The metal slats C, formed with longitu-l dinal grooves b, as described, and having the tenons D fitted therein, substantially as speciiied.

2. The blind-frame,made up of rectangular metal tubes A A and elbows B B, substantially as shown anddescribed.

W. E. BROOK.'

Witnesses: v FRED. HAYNES, FERD fluscrr.` 

